CN103316896B

CN103316896B - A kind of processing method of egg-shell meal

Info

Publication number: CN103316896B
Application number: CN201310262245.7A
Authority: CN
Inventors: 赵伟; 王宇; 韩凯; 杨巍
Original assignee: Beijing Er Shang Jianli Food Science & Technology Co Ltd
Current assignee: Beijing Er Shang Jianli Food Science & Technology Co Ltd
Priority date: 2013-06-27
Filing date: 2013-06-27
Publication date: 2016-08-10
Anticipated expiration: 2033-06-27
Also published as: CN103316896A

Abstract

The invention discloses a kind of simple, economic shell membrane to separate, and then obtain high-purity eggshell powder and the method for film.The process steps of egg-shell meal of the present invention includes: egg liquid impurity and the sterilization of residual in eggshell is removed in pretreatment, dries, and pulverizes, and soaks, and shell membrane separates.Compared with prior art, egg-shell meal and the purity of film after present invention separation are higher, and production cost is lower.

Description

A kind of processing method of egg-shell meal

Technical field

The processing method that the present invention relates to a kind of egg-shell meal, prepares egg particularly to by the process unsegregated eggshell of shell membrane The processing method of shell powder.

Background technology

Eggshell accounts for 10% the 12% of whole egg quality, is made up of film 3 part under film, true shell, shell on shell.On shell, film is again Claim colloid membrane, cover at eggshell surface, the mucus of white clear be dried and form.True shell has another name called Calx shell, and main constituent is Calcium carbonate, accounts for the 93% of true chitin amount.Under shell, film is at eggshell internal layer, is made up of with albuminous coat egg shell membrane, referred to herein Egg shell membrane is actually film under shell.

Annual world fowl egg yield reaches 60,000,000 tons, the most Chinese nearly 30,000,000 tons, if accounting for egg quality by eggshell 11% calculate, 6,600,000 tons of the world's annual output eggshell, in state-owned 3,300,000 tons.Tradition is treated the method for eggshell and is just treated as rubbish Rubbish processes, and this causes greatly pollution to environment.Eggshell is valuable natural biologic material, in addition to being used for extracting lysozyme, Also have a lot of purposes.First Calx shell is high-quality calcium resource, can be directly used for nutrition manufacturing industry, pharmacy industry, animal feeding-stuff and work Thing fertilizer processing industry, a new generation's calsium supplement raw materials for production;Simultaneously, because the peculiar structure of eggshell, composition, character, can also be used with Make enzyme immobilization carrier, chromatograph packing material, ceramic pigment, fluoride wastewater treatment agent, abstergent, porcelain enamel industry grinding agent, beverage clear Clear agent etc..

Currently available technology carries out shell membrane, and to carry out separating and then obtain egg-shell meal method inefficient, is obtained after separation The purity of egg-shell meal and film is the highest, i.e. containing higher protein in egg-shell meal, containing more calcium carbonate in film, and is separated into This height.

Summary of the invention

For problems of the prior art, the processing method that it is an object of the invention to provide a kind of egg-shell meal, it is somebody's turn to do Method is simply effective, can be substantially reduced the protein content in egg-shell meal and the content by the calcium carbonate in separation film.

For achieving the above object, the processing method of a kind of egg-shell meal of the present invention, concrete steps include:

Step 1) fresh eggshell pretreatment, removes egg liquid and the impurity of residual, and sterilization processing；

Step 2) described pretreated eggshell put in dehydrator and dry；

Eggshell after described drying is put into and is crushed to 8-20mm in pulverizer by step 3)；

Eggshell after described pulverizing is placed to soak in 1-2 hour, and immersion process in water and is filled eggshell by step 4) Divide stirring；

Eggshell after described immersion is positioned in the shell membrane seperator comprising water by step 5), the flow velocity of regulation water, passes through Stirring and overflow method, make egg shell membrane separate.

Further, the order successively of the pretreatment in described step 1) includes:

To beat eggs the fresh eggshell after separating, and put into centrifuge and be centrifuged processing, remove the egg liquid of residual in eggshell；

Cleaning, the eggshell after being centrifuged is put into and is stirred in blender cleaning, and puts into water while stirring and cleans, enters one Step removes the egg liquid of residual in eggshell, cleans to clarification of water；

Soaking sterilization, the eggshell after cleaning puts into immersion 10-in the disinfectant solution that effective chlorine density is 200-300ppm 30 minutes, eggshell is carried out soaking sterilization；

Impurity screening, is stirred the eggshell after soaking sterilization cleaning, removes the chloride ion in water, clean to chlorine residue Below concentration 0.3mg/L, then filter out impurity with filter.

Further, the centrifuge speed 1000-3000rpm of described centrifugal treating.

Further, described step 2) drying temperature 90-150 DEG C, and dry to eggshell moisture less than 10%.

Further, the described water of described step 5) is with the described water in described step 4) by closed circuit the most again Recycle.

Further, the eggshell obtained after described step 5) is ground to 200-300 mesh.

Further, the eggshell after described grinding carrying out pasteurize process, described pasteurization heating temperature is 85-90 DEG C, the retention time is 20-30 minute.

Further, the eggshell after described pasteurize being processed is spray-dried.Inlet temperature 150-of described spray drying 170 DEG C, outlet temperature 70-90 DEG C, egg-shell meal moisture is below 5% after treatment.

Due to the restriction of working ability, or raw-material suddenly high-volume is bought, usually can not be in time to fresh eggshell It is processed, and if do not processed these eggshells in time, these eggshells are easy to moldy metamorphism.And through step 2) dry Eggshell after Gan can never degenerate with long-time storage, and waits the continuation of next step operation, and then solves this problem in that.

Add the immersion of step 4) so that shell membrane is easier to separate, and before soaking, pulverising step then makes to soak more to fill Divide and thoroughly, the process time of follow-up shell membrane separation circuit is greatly shortened, and reduces production cost.And with prior art phase Ratio, the present invention separate after egg-shell meal and the purity of film higher, the content of the calcium carbonate in protein content and film in egg-shell meal It is obtained for reduction greatly.

Accompanying drawing explanation

Fig. 1 is the flow chart of the processing method of egg-shell meal of the present invention.

Fig. 2 is egg-shell meal processing method detailed description of the invention flow chart.

Detailed description of the invention

Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is illustrated.

As in figure 2 it is shown, specific implementation method is as follows in specific embodiment 1:

Operation 1: centrifugal.Will beat eggs separate after fresh eggshell, put into centrifuge and be centrifuged, remove in described eggshell residual The egg liquid stayed.Described centrifuge speed 1000rpm.

Operation 2: clean.Eggshell after described being centrifuged is put into and blender is stirred clean, put into water while stirring Clean, remove the egg liquid of residual in eggshell further, clean to clarification of water.

Operation 3: soaking sterilization.Eggshell after described cleaning is put in the disinfectant solution that effective chlorine density is 200ppm and soak Steep 30 minutes, eggshell is carried out soaking sterilization.

Operation 4: impurity screening.It is stirred the eggshell after soaking sterilization cleaning, removes the chloride ion in water, clean extremely Below residual chlorine concentration 0.3mg/L, then filters out impurity with filter.

Operation 5: dry.Eggshell after impurity screening is put in dehydrator and dry, dry temperature 90 DEG C, dry to eggshell Moisture is less than 10%.

Operation 6: pulverize.Eggshell after drying is put into and is crushed to 8mm in pulverizer.

Operation 7: soak.Eggshell after pulverizing is carried out moistening, places in clear water and soak 1 hour, and soaked described Described eggshell is sufficiently stirred for by journey.

Operation 8: the eggshell after soaking puts into shell membrane seperator, regulates the flow velocity of water, by methods such as stirring, overflows, Egg shell membrane is made to be sufficiently separated.

Operation 9: grind.With ball mill, the eggshell of described pulverizing is fully ground to 200 mesh.

Operation 10: sterilization.Eggshell after grinding carries out pasteurize.Described pasteurization heating temperature is 85 DEG C, protects The time of holding is 30 minutes.

Operation 11: be spray-dried.Eggshell after described pasteurize is spray-dried, the import of described spray drying Temperature 150 DEG C, outlet temperature 70 DEG C, egg-shell meal moisture is not higher than 5% after treatment.

Egg-shell meal processing method disclosed in this invention, the eggshell impurity after described centrifugal and impurity screening and antibacterial Content significantly reduces；After described immersion, shell membrane can be easily separated, the egg-shell meal obtained after shell membrane separates and the purity of film Significantly improve.Before immersion, eggshell is pulverized, then improve and soak effect and efficiency, while shortening soak time, also Can eggshell soak more thoroughly and fully.The further attrition grinding of eggshell after shell membrane is separated and sterilization processing, it is thus achieved that with Prior art compares even more ideal aseptic egg-shell meal.

As in figure 2 it is shown, specific embodiment 2 step is essentially identical with embodiment 1 step, difference is:

1) in operation 1, centrifuge speed is 2000rpm.

2) in operation 3, during soaking sterilization, the effective chlorine density of disinfectant solution is 250ppm, and soak time is 15 minutes.

3) drying temperature in operation 5 is 100 DEG C.

4) operation 6 egg-shell meal is broken to 15mm size.

5) in operation 7, in clear water, soak time is 1.5 hours.

6), in operation 9, with skin grinder, eggshell is ground to 250 mesh.

7) in operation 10, pasteurize heating-up temperature is 87 DEG C, and the retention time is 25 minutes.

8) inlet temperature that operation 11 is spray-dried is 160 DEG C, outlet temperature 80 DEG C.

Compared with Example 1, due to the raising of centrifugal rotational speed, eggshell impurity after described centrifugal and impurity screening and Bacterial content reduces further；Due to the prolongation of soak time, the egg-shell meal obtained after shell membrane separates and the purity of film are entered One step improves, the further attrition grinding of eggshell after separating shell membrane and sterilization processing, it is thus achieved that even more ideal aseptic eggshell Powder.

As in figure 2 it is shown, specific embodiment 3 step is essentially identical with embodiment 1 step, difference is:

1) in operation 1, centrifuge speed is 3000rpm.

2) in operation 3, during soaking sterilization, the effective chlorine density of disinfectant solution is 300ppm, soak time 10 minutes.

3) drying temperature in operation 5 is 150 DEG C.

4) operation 6 egg-shell meal is broken to 20mm size.

5) in operation 7, in clear water, soak time is 2 hours.

6) in operation 9, eggshell is ground to 300 mesh.

7) in operation 10, pasteurize heating-up temperature is 90 DEG C, and the retention time is 20 minutes.

8) inlet temperature that operation 11 is spray-dried is 170 DEG C, outlet temperature 90 DEG C.

Compared with embodiment 1 and embodiment 2, eggshell impurity and bacterial content after described centrifugal and impurity screening are further Reduce；The egg-shell meal obtained after shell membrane separates and the purity of film further walk raising, and the eggshell after separating shell membrane is further Attrition grinding and sterilization processing, egg-shell meal is even more ideal.

The process equipment of egg-shell meal disclosed in this invention, the most in hgher efficiency, the egg-shell meal that obtained Purity and sterility are obviously improved, and preparation cost is lower.

Claims

1. the processing method of an egg-shell meal, it is characterised in that including:

Step 1) will be beaten eggs the fresh eggshell after separating, and put into centrifuge and is centrifuged processing, remove the egg of residual in eggshell Liquid；

Step 2) clean, the eggshell after being centrifuged is put into and is stirred in blender cleaning, and puts into water while stirring and cleans, enters One step removes the egg liquid of residual in eggshell until clarification of water；

Step 3) soaking sterilization, the eggshell after cleaning puts into immersion 10-in the disinfectant solution that effective chlorine density is 200-300ppm 30 minutes, eggshell is carried out soaking sterilization；

Step 4) impurity screening, is stirred the eggshell after soaking sterilization cleaning, removes the chloride ion in water, clean to remaining Below cl concn 0.3mg/L, then filters out impurity with filter；

Eggshell after described impurity screening is put into and is dried in dehydrator to eggshell moisture less than 10% by step 5)；

Eggshell after described drying is put into and is crushed to 8-20mm in pulverizer by step 6)；

Eggshell after described pulverizing is placed to soak in 1-2 hour, and immersion process in water and is fully stirred eggshell by step 7) Mix；

Eggshell after described immersion is positioned in the shell membrane seperator comprising water by step 8), and the flow velocity of regulation water, by stirring With overflow method, egg shell membrane is made to separate.

2. the processing method of egg-shell meal as claimed in claim 1, it is characterised in that drying temperature 90-150 of described step 5) ℃。

3. the processing method of egg-shell meal as claimed in claim 1, it is characterised in that in the described shell membrane seperator of described step 8) Described water recycles with the described water in described step 7).

4. the processing method of egg-shell meal as claimed in claim 1, it is characterised in that also include:

(1) the eggshell obtained after described step 8) is ground to 200-300 mesh；

(2) the eggshell after described grinding is carried out pasteurize；

(3) the eggshell after described pasteurize is spray-dried.

5. the processing method of egg-shell meal as claimed in claim 4, it is characterised in that described pasteurization heating temperature is 85-90 DEG C, the retention time is 20-30 minute.

6. the processing method of egg-shell meal as claimed in claim 4, it is characterised in that the inlet temperature of described spray drying is 150- 170 DEG C, outlet temperature is 70-90 DEG C, and egg-shell meal moisture is below 5% after treatment.